Surface tension of electrolyte solutions: Comparing the effects of ionic dispersion forces and solvation

被引：15

作者：

Edwards, SA ^{[1
]}

Williams, DRM ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Appl Math, Canberra, ACT 0200, Australia

来源：

EUROPHYSICS LETTERS | 2006年 / 74卷 / 05期

关键词：

D O I：

10.1209/epl/i2006-10030-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of salt on the surface tension of water is yet to be understood. We derive approximate analytical expressions for the influence of two different ion-specific effects on the surface tension of an electrolyte: the dispersion interaction between the ions and the air-water interface, and the change in solvation energy of the ions as they approach the interface. These formulae provide a simple means of comparing the relative importance of the two effects. We carry out such a comparison for the case of 1M NaCl, and find that solvation is the dominant effect.

引用

页码：854 / 860

页数：7

共 12 条

[1] Surface tension of electrolytes:: Specific ion effects explained by dispersion forces [J].

Boström, M ;

Williams, DRM ;

Ninham, BW .

LANGMUIR, 2001, 17 (15) :4475-4478

[2] Hofmeister effects in surface tension of aqueous electrolyte solution [J].

Boström, M ;

Kunz, W ;

Ninham, BW .

LANGMUIR, 2005, 21 (06) :2619-2623

[3] Double layers and interparticle forces in colloid science and biology: Analytic results for the effect of ionic dispersion forces [J].

Edwards, SA ;

Williams, DRM .

PHYSICAL REVIEW LETTERS, 2004, 92 (24) :248303-1

[4] Role of hydration and water structure in biological and colloidal interactions [J].

Israelachvili, J ;

Wennerstrom, H .

NATURE, 1996, 379 (6562) :219-225

[5] Molecular structure of salt solutions: A new view of the interface with implications for heterogeneous atmospheric chemistry [J].

Jungwirth, P ;

Tobias, DJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (43) :10468-10472

[6] Osmotic coefficients and surface tensions of aqueous electrolyte solutions: Role of dispersion forces [J].

Kunz, W ;

Belloni, L ;

Bernard, O ;

Ninham, BW .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (07) :2398-2404

[7] 'Zur Lehre von der Wirkung der Salze' (about the science of the effect of salts): Franz Hofmeister's historical papers [J].

Kunz, W ;

Henle, J ;

Ninham, BW .

CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2004, 9 (1-2) :19-37

[8] The present state of affairs with Hofmeister effects [J].

Kunz, W ;

Lo Nostro, P ;

Ninham, BW .

CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2004, 9 (1-2) :1-18

[9]

Lau AWC, 2002, PHYS REV E, V66, DOI 10.1103/PhysRevE.66.041501

[10] Ion binding and ion specificity: The Hofmeister effect and Onsager and Lifshitz theories [J].

Ninham, BW ;

Yaminsky, V .

LANGMUIR, 1997, 13 (07) :2097-2108

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